Empire Fulton Ferry Park closed down at the beginning of the year for a $3.5 million reconstruction project, but no work has been done since then.

A standoff between state and city officials is to blame for the delay, sources said.

State Controller Thomas DiNapoli is refusing to sign off on necessary construction contracts because he doesn't think the Brooklyn Bridge Park Development Corp. - which took over the space from the state Parks Department in January - has the legal authority to do the work.

That's because a glitch in the agreement between the two state agencies left it unclear whether BBPDC has taken ownership of the site or just secured a long-term lease.

It's turned into a "huge stalemate" that has left DUMBO residents locked out of the park even though there's no construction going on, one source said.